4
4 Ratings
Summary
Dr. John Oppenheimer treats chronic kidney disease, kidney disease, and breathing problems, and practices internal medicine in Sag Harbor, New York. He has practiced for 45 years and is affiliated with Stony Brook Southampton Hospital.
Dr. Oppenheimer earned his medical degree from Tulane University School of Medicine and completed his residency at NYU Downtown Hospital. He sees patients in Sag Harbor, New York, and speaks English and Spanish. Patients on Vitals rate Dr. Oppenheimer 4 out of 5.
Dr. Oppenheimer earned his medical degree from Tulane University School of Medicine and completed his residency at NYU Downtown Hospital. He sees patients in Sag Harbor, New York, and speaks English and Spanish. Patients on Vitals rate Dr. Oppenheimer 4 out of 5.
Overview based on verified provider data
Quick Facts
- 45 years of experience
- 16 insurance plans accepted
- speaks English, Spanish
- Nyu Downtown Hospital
- 1 specialty
- 8 areas of expertise
- 1 hospital affiliation
- 1 office location
- Male
Patients’ Perspective
- Gave an accurate diagnosis
- Had a good bedside manner
- Spent time with me
Based on patient feedback. Read the reviews
Office Location
Oppenheimer John K Office
60 Bay StSag Harbor, NY 11963 Tel: (631) 725-4600
Mon9:00 am - 5:00 pm
Tue9:00 am - 5:00 pm
Wed9:00 am - 5:00 pm
Thu9:00 am - 5:00 pm
Fri9:00 am - 12:00 pm
SatClosed
SunClosed
Compare with Similar Doctors
 |  |  |  |
| Dr. John Kevin Oppenheimer, MD | Dr. Monica P. Luthra, DO | Dr. Mukund Madhaw Das, MD | Dr. Gretchen Mockler, MD |
| Internal Medicine | Internal Medicine | Internal Medicine | Internal Medicine |
| Accepts New Patients | Accepts New Patients | ||
| 45 Years of Experience | 13 Years of Experience | 10 Years of Experience | 24 Years of Experience |
| No Virtual Visit Option | Virtual Visit Available | Virtual Visit Available | Virtual Visit Available |
| Speaks English, Spanish | Speaks English | Speaks English, Hindi, Urdu | Speaks English, French, Spanish |
| Sag Harbor , NY | Buffalo , NY | Bergenfield , NJ | Southampton , NY |
| Med School: Tulane University School Of Medicine | Med School: St Georges University School Of Medicine | Med School: Weill Cornell Medical College | |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Dr. John Kevin Oppenheimer
Medical Specialties
Dr. John Kevin Oppenheimer has the following specialty
Specialty Expertise
Dr. John Kevin Oppenheimer has the following 8 areas of expertise
Certifications, License, & Education
45 Years Experience
Dr. John Kevin Oppenheimer holds an expired medical license in the state of New York.
Medical License
Medical Doctor with an expired medical license in the state of New York that expired in 2026.
Education & Training
Residency
Completed their residency at Nyu Downtown Hospital.
Medical School
Graduated from Tulane University School Of Medicine in 1981.
NPI Number
Dr. Oppenheimer's NPI number is 1659364214.
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Frequently Asked Questions
- Which hospitals is Dr. John Oppenheimer affiliated with?
- Dr. John Oppenheimer is affiliated with Stony Brook Southampton Hospital.
- What languages does Dr. John Oppenheimer speak?
- Dr. John Oppenheimer speaks English and Spanish.
- Where is Dr. John Oppenheimer's office located?
- Dr. John Oppenheimer's office is located at 60 Bay St, Sag Harbor, NY, 11963.
- Does Dr. John Oppenheimer accept virtual/telehealth appointments?
- Dr. John Oppenheimer has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
- How can I make an appointment with Dr. John Oppenheimer?
- You can find contact information for Dr. John Oppenheimer here on Vitals.
Data Sources
This provider profile is built using data from:
- NPPES NPI Registry
- State medical licensing boards
- Healthcare system and provider network data
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